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Issue "'{0}' declarations can only be declared inside a block." for block-scoped variables in presence of parse errors #61824
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jakebailey
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Andarist:fix/block-scoped-error-when-parse-errors
Jun 6, 2025
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73 changes: 73 additions & 0 deletions
73
tests/baselines/reference/disallowedBlockScopedInPresenceOfParseErrors1.errors.txt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(5,5): error TS1156: 'const' declarations can only be declared inside a block. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(6,17): error TS2454: Variable 'e' is used before being assigned. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(8,1): error TS1128: Declaration or statement expected. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(12,5): error TS1156: 'let' declarations can only be declared inside a block. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(13,17): error TS2454: Variable 'e' is used before being assigned. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(15,1): error TS1128: Declaration or statement expected. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(21,5): error TS1156: 'using' declarations can only be declared inside a block. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(22,17): error TS2454: Variable 'e' is used before being assigned. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(24,1): error TS1128: Declaration or statement expected. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(30,5): error TS1156: 'await using' declarations can only be declared inside a block. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(31,17): error TS2454: Variable 'e' is used before being assigned. | ||
| disallowedBlockScopedInPresenceOfParseErrors1.ts(33,1): error TS1128: Declaration or statement expected. | ||
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| ==== disallowedBlockScopedInPresenceOfParseErrors1.ts (12 errors) ==== | ||
| // https://github.com/microsoft/TypeScript/issues/61734 | ||
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| function f1() { | ||
| if (1 > 0) | ||
| const e = 3; | ||
| ~~~~~~~~~~~~ | ||
| !!! error TS1156: 'const' declarations can only be declared inside a block. | ||
| console.log(e); | ||
| ~ | ||
| !!! error TS2454: Variable 'e' is used before being assigned. | ||
| } | ||
| } | ||
| ~ | ||
| !!! error TS1128: Declaration or statement expected. | ||
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| function f2() { | ||
| if (1 > 0) | ||
| let e = 3; | ||
| ~~~~~~~~~~ | ||
| !!! error TS1156: 'let' declarations can only be declared inside a block. | ||
| console.log(e); | ||
| ~ | ||
| !!! error TS2454: Variable 'e' is used before being assigned. | ||
| } | ||
| } | ||
| ~ | ||
| !!! error TS1128: Declaration or statement expected. | ||
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| declare const resource: Disposable | ||
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| function f3() { | ||
| if (1 > 0) | ||
| using e = resource; | ||
| ~~~~~~~~~~~~~~~~~~~ | ||
| !!! error TS1156: 'using' declarations can only be declared inside a block. | ||
| console.log(e); | ||
| ~ | ||
| !!! error TS2454: Variable 'e' is used before being assigned. | ||
| } | ||
| } | ||
| ~ | ||
| !!! error TS1128: Declaration or statement expected. | ||
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| declare const asyncResource: AsyncDisposable | ||
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| async function f4() { | ||
| if (1 > 0) | ||
| await using e = asyncResource; | ||
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
| !!! error TS1156: 'await using' declarations can only be declared inside a block. | ||
| console.log(e); | ||
| ~ | ||
| !!! error TS2454: Variable 'e' is used before being assigned. | ||
| } | ||
| } | ||
| ~ | ||
| !!! error TS1128: Declaration or statement expected. | ||
|
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75 changes: 75 additions & 0 deletions
75
tests/baselines/reference/disallowedBlockScopedInPresenceOfParseErrors1.symbols
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| //// [tests/cases/compiler/disallowedBlockScopedInPresenceOfParseErrors1.ts] //// | ||
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| === disallowedBlockScopedInPresenceOfParseErrors1.ts === | ||
| // https://github.com/microsoft/TypeScript/issues/61734 | ||
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| function f1() { | ||
| >f1 : Symbol(f1, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 0, 0)) | ||
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| if (1 > 0) | ||
| const e = 3; | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 4, 9)) | ||
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| console.log(e); | ||
| >console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >console : Symbol(console, Decl(lib.dom.d.ts, --, --)) | ||
| >log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 4, 9)) | ||
| } | ||
| } | ||
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| function f2() { | ||
| >f2 : Symbol(f2, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 7, 1)) | ||
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| if (1 > 0) | ||
| let e = 3; | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 11, 7)) | ||
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| console.log(e); | ||
| >console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >console : Symbol(console, Decl(lib.dom.d.ts, --, --)) | ||
| >log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 11, 7)) | ||
| } | ||
| } | ||
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| declare const resource: Disposable | ||
| >resource : Symbol(resource, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 16, 13)) | ||
| >Disposable : Symbol(Disposable, Decl(lib.esnext.disposable.d.ts, --, --)) | ||
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| function f3() { | ||
| >f3 : Symbol(f3, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 16, 34)) | ||
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| if (1 > 0) | ||
| using e = resource; | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 20, 9)) | ||
| >resource : Symbol(resource, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 16, 13)) | ||
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| console.log(e); | ||
| >console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >console : Symbol(console, Decl(lib.dom.d.ts, --, --)) | ||
| >log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 20, 9)) | ||
| } | ||
| } | ||
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| declare const asyncResource: AsyncDisposable | ||
| >asyncResource : Symbol(asyncResource, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 25, 13)) | ||
| >AsyncDisposable : Symbol(AsyncDisposable, Decl(lib.esnext.disposable.d.ts, --, --)) | ||
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| async function f4() { | ||
| >f4 : Symbol(f4, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 25, 44)) | ||
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| if (1 > 0) | ||
| await using e = asyncResource; | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 29, 15)) | ||
| >asyncResource : Symbol(asyncResource, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 25, 13)) | ||
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| console.log(e); | ||
| >console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >console : Symbol(console, Decl(lib.dom.d.ts, --, --)) | ||
| >log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --)) | ||
| >e : Symbol(e, Decl(disallowedBlockScopedInPresenceOfParseErrors1.ts, 29, 15)) | ||
| } | ||
| } | ||
|
|
141 changes: 141 additions & 0 deletions
141
tests/baselines/reference/disallowedBlockScopedInPresenceOfParseErrors1.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| //// [tests/cases/compiler/disallowedBlockScopedInPresenceOfParseErrors1.ts] //// | ||
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| === disallowedBlockScopedInPresenceOfParseErrors1.ts === | ||
| // https://github.com/microsoft/TypeScript/issues/61734 | ||
|
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| function f1() { | ||
| >f1 : () => void | ||
| > : ^^^^^^^^^^ | ||
|
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| if (1 > 0) | ||
| >1 > 0 : boolean | ||
| > : ^^^^^^^ | ||
| >1 : 1 | ||
| > : ^ | ||
| >0 : 0 | ||
| > : ^ | ||
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| const e = 3; | ||
| >e : 3 | ||
| > : ^ | ||
| >3 : 3 | ||
| > : ^ | ||
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| console.log(e); | ||
| >console.log(e) : void | ||
| > : ^^^^ | ||
| >console.log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >console : Console | ||
| > : ^^^^^^^ | ||
| >log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >e : 3 | ||
| > : ^ | ||
| } | ||
| } | ||
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| function f2() { | ||
| >f2 : () => void | ||
| > : ^^^^^^^^^^ | ||
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| if (1 > 0) | ||
| >1 > 0 : boolean | ||
| > : ^^^^^^^ | ||
| >1 : 1 | ||
| > : ^ | ||
| >0 : 0 | ||
| > : ^ | ||
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| let e = 3; | ||
| >e : number | ||
| > : ^^^^^^ | ||
| >3 : 3 | ||
| > : ^ | ||
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| console.log(e); | ||
| >console.log(e) : void | ||
| > : ^^^^ | ||
| >console.log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >console : Console | ||
| > : ^^^^^^^ | ||
| >log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >e : number | ||
| > : ^^^^^^ | ||
| } | ||
| } | ||
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| declare const resource: Disposable | ||
| >resource : Disposable | ||
| > : ^^^^^^^^^^ | ||
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| function f3() { | ||
| >f3 : () => void | ||
| > : ^^^^^^^^^^ | ||
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| if (1 > 0) | ||
| >1 > 0 : boolean | ||
| > : ^^^^^^^ | ||
| >1 : 1 | ||
| > : ^ | ||
| >0 : 0 | ||
| > : ^ | ||
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| using e = resource; | ||
| >e : Disposable | ||
| > : ^^^^^^^^^^ | ||
| >resource : Disposable | ||
| > : ^^^^^^^^^^ | ||
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| console.log(e); | ||
| >console.log(e) : void | ||
| > : ^^^^ | ||
| >console.log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >console : Console | ||
| > : ^^^^^^^ | ||
| >log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >e : Disposable | ||
| > : ^^^^^^^^^^ | ||
| } | ||
| } | ||
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| declare const asyncResource: AsyncDisposable | ||
| >asyncResource : AsyncDisposable | ||
| > : ^^^^^^^^^^^^^^^ | ||
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| async function f4() { | ||
| >f4 : () => Promise<void> | ||
| > : ^^^^^^^^^^^^^^^^^^^ | ||
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| if (1 > 0) | ||
| >1 > 0 : boolean | ||
| > : ^^^^^^^ | ||
| >1 : 1 | ||
| > : ^ | ||
| >0 : 0 | ||
| > : ^ | ||
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| await using e = asyncResource; | ||
| >e : AsyncDisposable | ||
| > : ^^^^^^^^^^^^^^^ | ||
| >asyncResource : AsyncDisposable | ||
| > : ^^^^^^^^^^^^^^^ | ||
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| console.log(e); | ||
| >console.log(e) : void | ||
| > : ^^^^ | ||
| >console.log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >console : Console | ||
| > : ^^^^^^^ | ||
| >log : (...data: any[]) => void | ||
| > : ^^^^ ^^ ^^^^^ | ||
| >e : AsyncDisposable | ||
| > : ^^^^^^^^^^^^^^^ | ||
| } | ||
| } | ||
|
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37 changes: 37 additions & 0 deletions
37
tests/cases/compiler/disallowedBlockScopedInPresenceOfParseErrors1.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| // @strict: true | ||
| // @target: esnext | ||
| // @noEmit: true | ||
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| // https://github.com/microsoft/TypeScript/issues/61734 | ||
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| function f1() { | ||
| if (1 > 0) | ||
| const e = 3; | ||
| console.log(e); | ||
| } | ||
| } | ||
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| function f2() { | ||
| if (1 > 0) | ||
| let e = 3; | ||
| console.log(e); | ||
| } | ||
| } | ||
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| declare const resource: Disposable | ||
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| function f3() { | ||
| if (1 > 0) | ||
| using e = resource; | ||
| console.log(e); | ||
| } | ||
| } | ||
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| declare const asyncResource: AsyncDisposable | ||
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| async function f4() { | ||
| if (1 > 0) | ||
| await using e = asyncResource; | ||
| console.log(e); | ||
| } | ||
| } |
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